JPS6414520A - Restriction of vibration of burner tail tube - Google Patents

Abstract

PURPOSE:To prolong the abrasive life of a tail tube or a first stage nozzle blade, connected to the tail tube, by a method wherein a pin is pressed at the supporting part of a bracket with a given surface pressure and the vibration energy of the pin is dispersed at the contacting surface thereof when the micro- movement of the tail tube occurs. CONSTITUTION:A bracket 9 is attached to a check pin 8 and is connected to another bracket 11, supported by a retainer fixing a first stage nozzle 12, through a column type pin 10, permitting rotary micro-movement. The column type pin 10 itself is fixed to the bracket 9 and bolts 17a, 17b fix a press piece 20 to the bracket 11 through washers 18a, 18b and springs 19a, 19b. The springs 19a, 19b press the precs piece 20 against the column type pin 10 with a given force. Washers 21a, 21b are provided between the brackets 9, 11 to permit a relative movement in both axial ends of the column type pin 10, therefore, the abrasion of both axial ends becomes half compared with a case having no washers. Contacting surfaces between the column type pin 10 and the press piece 20 as well as the bracket 11 effect micro-movement, therefore, these surfaces are coated with ceramics series abrasion resistant agent to improve abrasion resistance.